I didn't receive the text message until I turned it on. What happened?

Do you say the battery shuts down automatically when it is dead, or do you shut it down yourself?

One possibility is this:

SMS has a maximum time limit.

For example, I set this maximum time limit to 24 hours.

So if my texter doesn't call within 24 hours,

After this time, the message will be invalid.

You wouldn't understand.